The simple interest for 1 year for an investment was $372. If the interest rate had been 1% higher for this investment, the simple interest for 1 year would have been $434. How much money was invested?

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Assuming we start with \(P\) dollars, an interest rate of \(x\)%:

$$ P\left(\frac{x}{100}\right) = 372 $$

If we increase the rate by \(1\%\):

$$ P\left(\frac{x+1}{100}\right) = 434 $$

Dividing the equations:

$$ \frac{P\left(\frac{x+1}{100}\right)}{P\left(\frac{x}{100}\right)} = \frac{434}{372} $$ $$ \frac{x+1}{x} = \frac{434}{372} $$ $$ 372x+372 = 434x $$ $$ 372 = 62x $$ $$ x = 6 $$

Using the original equation:

$$ P\left(\frac{6}{100}\right) = 372 $$ $$ P = \boxed{6{,}200} $$